Lock for pianos



UNITED STATES A. F. PFEIFER, OF NEWARK, NEW JERSEY.

LOOK FOR PIANOS.

Specification forming part of Letters Patent No. 49,149, dated August 1,1865.

To all whom it may concern:

Be it known that I, A. F. PFEIFER, of New, ark, in the county of Essexand State of New Jersey, have invented a new and Improved Lock; and I dohereby declare that the followin gis a full, clear, and exactdescription thereof, which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawings,forming part of this specification, in which- Figure 1 is aninteriorside View of my invention, the side of the lock-case nearest the eyebeing removed, as indicated by the line mm, Fig. 2; Fig. 2, atransversevertical section of the same, taken in the line y 3 Fig. 1.

Similar letters of reference indicate like parts.

This invention relates to a new and improved lock for desks, pianos,chests, the cases of sewing-machines, &c.; and it consists in theemployment or use of a bolt pivoted to a sliding bolt and arranged insuch a manner as to turn over and catch into the plate which is attachedto the lid or cover of the article to which the lock is applied, and atthe same time be capable of turning back, so as to pass out of the platewhen the lock is unlocked.

A represents the lock-case, which may be of the ordinary square form andprovided with a sliding bolt, B, having a tumbler, 0, connected with it.This tumbler G and bolt B are operated by means of a key, D, as usual.The bolt B passes or works through an opening, a, in the top of the caseA, and it has a supplemental bolt, E, secured to it by a pivot, 12. Thisbolt E is formed at its lower end with two arms or projections, c c, atopposite sides, as shown in Fig. l, and it has a member recess, d, madein its left-hand side.

The notch or recess d admits of the bolt E turning and hooking over theedgeof an opening in a plate, F, when the sliding bolt Bis shoved upwardthrough said opening, the bolt E being turned in consequence of its arm0. coming in contact with the top of the case A. The other arm, 0,serves as a stop for the bolt B. In drawing down the bolt B the bolt E.

turns so as to free itself from the edge of the opening in the plate F,in consequence of the arm a being drawn down with the bolt B and fromthe top of the lock-case. It will be seen, therefore, that the boltDcannot turn when in or through the plate F, in consequence of the arm 0being in contact with the upper partor top of the lock-case.

This lock may be manufactured at a moderate expense, and it posseses theadvantage of simplicity and containing .no parts which are liable to getout of repair.

Witnesses G. SANDFORD, CHARLES P. ZIMMERMAN.

